Anyone who’s ever been swarmed by mosquitoes while trying to unwind on a scenic hike or placid beach is keenly aware that even a small pest can have a big impact on a vacation. But beyond a mere nuisance, mosquitoes can pose a more serious health risk as carriers of diseases like malaria, dengue and zika. Soneva Fushi, a resort on the private Kunfunadhoo Island in the Maldives, has spent years working to eradicate these pests.